1 /*
   2  * Copyright (c) 2001, 2008, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "incls/_precompiled.incl"
  26 #include "incls/_g1BlockOffsetTable.cpp.incl"



  27 
  28 //////////////////////////////////////////////////////////////////////
  29 // G1BlockOffsetSharedArray
  30 //////////////////////////////////////////////////////////////////////
  31 
  32 G1BlockOffsetSharedArray::G1BlockOffsetSharedArray(MemRegion reserved,
  33                                                    size_t init_word_size) :
  34   _reserved(reserved), _end(NULL)
  35 {
  36   size_t size = compute_size(reserved.word_size());
  37   ReservedSpace rs(ReservedSpace::allocation_align_size_up(size));
  38   if (!rs.is_reserved()) {
  39     vm_exit_during_initialization("Could not reserve enough space for heap offset array");
  40   }
  41   if (!_vs.initialize(rs, 0)) {
  42     vm_exit_during_initialization("Could not reserve enough space for heap offset array");
  43   }
  44   _offset_array = (u_char*)_vs.low_boundary();
  45   resize(init_word_size);
  46   if (TraceBlockOffsetTable) {

   1 /*
   2  * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "gc_implementation/g1/g1BlockOffsetTable.inline.hpp"
  27 #include "memory/space.hpp"
  28 #include "oops/oop.inline.hpp"
  29 #include "runtime/java.hpp"
  30 
  31 //////////////////////////////////////////////////////////////////////
  32 // G1BlockOffsetSharedArray
  33 //////////////////////////////////////////////////////////////////////
  34 
  35 G1BlockOffsetSharedArray::G1BlockOffsetSharedArray(MemRegion reserved,
  36                                                    size_t init_word_size) :
  37   _reserved(reserved), _end(NULL)
  38 {
  39   size_t size = compute_size(reserved.word_size());
  40   ReservedSpace rs(ReservedSpace::allocation_align_size_up(size));
  41   if (!rs.is_reserved()) {
  42     vm_exit_during_initialization("Could not reserve enough space for heap offset array");
  43   }
  44   if (!_vs.initialize(rs, 0)) {
  45     vm_exit_during_initialization("Could not reserve enough space for heap offset array");
  46   }
  47   _offset_array = (u_char*)_vs.low_boundary();
  48   resize(init_word_size);
  49   if (TraceBlockOffsetTable) {